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1 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1754 | jermar | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
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1754 | jermar | 32 | /** |
1757 | jermar | 33 | * @file |
1754 | jermar | 34 | * @brief i8042 processor driver. |
35 | * |
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36 | * It takes care of low-level keyboard functions. |
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1702 | cejka | 37 | */ |
38 | |||
1842 | jermar | 39 | #include <genarch/kbd/i8042.h> |
1843 | jermar | 40 | #include <genarch/kbd/key.h> |
1842 | jermar | 41 | #include <genarch/kbd/scanc.h> |
42 | #include <genarch/kbd/scanc_pc.h> |
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894 | jermar | 43 | #include <arch/drivers/i8042.h> |
1 | jermar | 44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
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46 | #include <arch.h> |
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508 | jermar | 47 | #include <typedefs.h> |
511 | jermar | 48 | #include <console/chardev.h> |
49 | #include <console/console.h> |
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576 | palkovsky | 50 | #include <interrupt.h> |
1956 | decky | 51 | #include <sysinfo/sysinfo.h> |
52 | #include <ddi/irq.h> |
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1 | jermar | 53 | |
1754 | jermar | 54 | /* Keyboard commands. */ |
512 | jermar | 55 | #define KBD_ENABLE 0xf4 |
56 | #define KBD_DISABLE 0xf5 |
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57 | #define KBD_ACK 0xfa |
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58 | |||
670 | vana | 59 | /* |
893 | jermar | 60 | * 60 Write 8042 Command Byte: next data byte written to port 60h is |
895 | jermar | 61 | * placed in 8042 command register. Format: |
893 | jermar | 62 | * |
63 | * |7|6|5|4|3|2|1|0|8042 Command Byte |
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64 | * | | | | | | | `---- 1=enable output register full interrupt |
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65 | * | | | | | | `----- should be 0 |
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66 | * | | | | | `------ 1=set status register system, 0=clear |
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67 | * | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
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68 | * | | | `-------- disable keyboard I/O by driving clock line low |
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69 | * | | `--------- disable auxiliary device, drives clock line low |
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70 | * | `---------- IBM scancode translation 0=AT, 1=PC/XT |
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71 | * `----------- reserved, should be 0 |
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72 | */ |
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670 | vana | 73 | |
893 | jermar | 74 | #define i8042_SET_COMMAND 0x60 |
1759 | palkovsky | 75 | #define i8042_COMMAND 0x69 |
894 | jermar | 76 | |
77 | #define i8042_BUFFER_FULL_MASK 0x01 |
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893 | jermar | 78 | #define i8042_WAIT_MASK 0x02 |
1759 | palkovsky | 79 | #define i8042_MOUSE_DATA 0x20 |
670 | vana | 80 | |
575 | palkovsky | 81 | static void i8042_suspend(chardev_t *); |
82 | static void i8042_resume(chardev_t *); |
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511 | jermar | 83 | |
84 | static chardev_operations_t ops = { |
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85 | .suspend = i8042_suspend, |
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878 | vana | 86 | .resume = i8042_resume, |
1896 | jermar | 87 | .read = i8042_key_read |
511 | jermar | 88 | }; |
89 | |||
1956 | decky | 90 | /** Structure for i8042's IRQ. */ |
1957 | decky | 91 | static irq_t i8042_kbd_irq; |
92 | static irq_t i8042_mouse_irq; |
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576 | palkovsky | 93 | |
1956 | decky | 94 | /** Wait until the controller reads its data. */ |
95 | static void i8042_wait(void) { |
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96 | while (i8042_status_read() & i8042_WAIT_MASK) { |
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97 | /* wait */ |
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98 | } |
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99 | } |
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100 | |||
1474 | palkovsky | 101 | void i8042_grab(void) |
1 | jermar | 102 | { |
1956 | decky | 103 | ipl_t ipl = interrupts_disable(); |
104 | |||
895 | jermar | 105 | i8042_wait(); |
894 | jermar | 106 | i8042_command_write(i8042_SET_COMMAND); |
895 | jermar | 107 | i8042_wait(); |
894 | jermar | 108 | i8042_data_write(i8042_COMMAND); |
895 | jermar | 109 | i8042_wait(); |
1956 | decky | 110 | |
1957 | decky | 111 | spinlock_lock(&i8042_kbd_irq.lock); |
112 | i8042_kbd_irq.notif_cfg.notify = false; |
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113 | spinlock_unlock(&i8042_kbd_irq.lock); |
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114 | |||
115 | spinlock_lock(&i8042_mouse_irq.lock); |
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116 | i8042_mouse_irq.notif_cfg.notify = false; |
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117 | spinlock_unlock(&i8042_mouse_irq.lock); |
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118 | |||
1956 | decky | 119 | interrupts_restore(ipl); |
1474 | palkovsky | 120 | } |
1956 | decky | 121 | |
1474 | palkovsky | 122 | void i8042_release(void) |
123 | { |
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1956 | decky | 124 | ipl_t ipl = interrupts_disable(); |
1957 | decky | 125 | |
126 | spinlock_lock(&i8042_kbd_irq.lock); |
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127 | if (i8042_kbd_irq.notif_cfg.answerbox) |
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128 | i8042_kbd_irq.notif_cfg.notify = true; |
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129 | spinlock_unlock(&i8042_kbd_irq.lock); |
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130 | |||
131 | spinlock_lock(&i8042_mouse_irq.lock); |
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132 | if (i8042_mouse_irq.notif_cfg.answerbox) |
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133 | i8042_mouse_irq.notif_cfg.notify = true; |
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134 | spinlock_unlock(&i8042_mouse_irq.lock); |
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135 | |||
1956 | decky | 136 | interrupts_restore(ipl); |
1474 | palkovsky | 137 | } |
670 | vana | 138 | |
1956 | decky | 139 | static irq_ownership_t i8042_claim(void) |
1474 | palkovsky | 140 | { |
1956 | decky | 141 | return IRQ_ACCEPT; |
142 | } |
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1474 | palkovsky | 143 | |
1957 | decky | 144 | static void i8042_kbd_irq_handler(irq_t *irq, void *arg, ...) |
1956 | decky | 145 | { |
146 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
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147 | ipc_irq_send_notif(irq); |
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148 | else { |
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149 | uint8_t x; |
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150 | uint8_t status; |
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151 | |||
152 | while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
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153 | x = i8042_data_read(); |
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154 | |||
155 | if ((status & i8042_MOUSE_DATA)) |
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156 | continue; |
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157 | |||
158 | if (x & KEY_RELEASE) |
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159 | key_released(x ^ KEY_RELEASE); |
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160 | else |
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161 | key_pressed(x); |
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162 | } |
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163 | } |
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164 | } |
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1474 | palkovsky | 165 | |
1957 | decky | 166 | static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...) |
167 | { |
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168 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
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169 | ipc_irq_send_notif(irq); |
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170 | } |
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171 | |||
1956 | decky | 172 | /** Initialize i8042. */ |
1957 | decky | 173 | void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr) |
1956 | decky | 174 | { |
575 | palkovsky | 175 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
511 | jermar | 176 | stdin = &kbrd; |
1956 | decky | 177 | |
1957 | decky | 178 | irq_initialize(&i8042_kbd_irq); |
179 | i8042_kbd_irq.devno = kbd_devno; |
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180 | i8042_kbd_irq.inr = kbd_inr; |
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181 | i8042_kbd_irq.claim = i8042_claim; |
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182 | i8042_kbd_irq.handler = i8042_kbd_irq_handler; |
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183 | irq_register(&i8042_kbd_irq); |
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1956 | decky | 184 | |
1957 | decky | 185 | irq_initialize(&i8042_mouse_irq); |
186 | i8042_mouse_irq.devno = mouse_devno; |
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187 | i8042_mouse_irq.inr = mouse_inr; |
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188 | i8042_mouse_irq.claim = i8042_claim; |
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189 | i8042_mouse_irq.handler = i8042_mouse_irq_handler; |
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190 | irq_register(&i8042_mouse_irq); |
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1956 | decky | 191 | |
1957 | decky | 192 | trap_virtual_enable_irqs(1 << kbd_inr); |
193 | trap_virtual_enable_irqs(1 << mouse_inr); |
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194 | |||
1194 | vana | 195 | /* |
1195 | jermar | 196 | * Clear input buffer. |
197 | * Number of iterations is limited to prevent infinite looping. |
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198 | */ |
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1956 | decky | 199 | int i; |
1195 | jermar | 200 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
1194 | vana | 201 | i8042_data_read(); |
1753 | palkovsky | 202 | } |
1956 | decky | 203 | |
204 | sysinfo_set_item_val("kbd", NULL, true); |
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1957 | decky | 205 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
206 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
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1956 | decky | 207 | |
1957 | decky | 208 | sysinfo_set_item_val("mouse", NULL, true); |
209 | sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
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210 | sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
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211 | |||
1956 | decky | 212 | i8042_grab(); |
1 | jermar | 213 | } |
508 | jermar | 214 | |
511 | jermar | 215 | /* Called from getc(). */ |
575 | palkovsky | 216 | void i8042_resume(chardev_t *d) |
511 | jermar | 217 | { |
218 | } |
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219 | |||
220 | /* Called from getc(). */ |
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575 | palkovsky | 221 | void i8042_suspend(chardev_t *d) |
511 | jermar | 222 | { |
223 | } |
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878 | vana | 224 | |
1896 | jermar | 225 | char i8042_key_read(chardev_t *d) |
878 | vana | 226 | { |
227 | char ch; |
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228 | |||
894 | jermar | 229 | while(!(ch = active_read_buff_read())) { |
1780 | jermar | 230 | uint8_t x; |
1753 | palkovsky | 231 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
894 | jermar | 232 | ; |
233 | x = i8042_data_read(); |
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1842 | jermar | 234 | if (x & KEY_RELEASE) |
235 | key_released(x ^ KEY_RELEASE); |
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236 | else |
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237 | active_read_key_pressed(x); |
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878 | vana | 238 | } |
239 | return ch; |
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240 | } |
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895 | jermar | 241 | |
242 | /** Poll for key press and release events. |
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243 | * |
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244 | * This function can be used to implement keyboard polling. |
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245 | */ |
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246 | void i8042_poll(void) |
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247 | { |
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1780 | jermar | 248 | uint8_t x; |
895 | jermar | 249 | |
250 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
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251 | x = i8042_data_read(); |
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1842 | jermar | 252 | if (x & KEY_RELEASE) |
253 | key_released(x ^ KEY_RELEASE); |
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254 | else |
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255 | key_pressed(x); |
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895 | jermar | 256 | } |
257 | } |
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1702 | cejka | 258 | |
1754 | jermar | 259 | /** @} |
1702 | cejka | 260 | */ |